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I am a postdoc at the university of Regensburg, in the group of Niko Naumann. Before that I was a PhD student in the Hebrew University of Jerusalem supervised by Tomer Schlank.
My mathematical interests lie in the realm of homotopy theory, with particular (though not exclusive) focus on chromatic homotopy theory, (∞,n)-categories and higher semiadditivity.
Contact: shai.keidar (at) ur.de
Research
Research
On The Telescopic Picard Group
Twisted Graded Categories joint with Shaul Ragimov
Semiadditive Algernating Powers and Twisted Power Operations joint with Shaul Ragimov
Organization
Organization
Chicago Chromatic Homotopy Day , February 2025
co-organized with Akhil Mathew, Tomer Schlank and Shaul Ragimov
Homotopy Theory: Revisiting Localizations and Beyond, June 2024
co-organized with Yonatan Harpaz, Leor Neuhauser, Tomer Schlank and Lior Yanovski
Caesarea Workshop on Topological Cyclic Homology, May 2023
co-organized with Shay Ben-Moshe and Lior Yanovski
Sea of Galilee Workshop on Algebraic Models for Spaces, September 2021
co-organized with Segev Cohen and Tomer Schlank
Teaching
Teaching
Spring 2024 - Algebraic Topology, TA, Hebrew University
Fall 2024 - Calculus A, TA, Hebrew University
Spring 2023 - Representation Theory, TA, Hebrew University
Spring 2022 - Algebraic Topology, TA, Hebrew University
Fall 2022 - Calculus A, TA, Hebrew University
Master's thesis
Master's thesis
I completed my master's thesis in geometric representation theory under the guidance of Prof. Dmitry Gourevitch. You can find it here.
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